Abstract:
A method and a device for operating a vehicle having a hybrid drive are described, in which a first drive unit and a second drive unit contribute jointly or individually to the drive of the vehicle, the first drive unit driving the second drive unit in the manner of a generator for charging an energy storage device, the first drive unit and the second drive unit being separable by a drive train element transferring a torque of the first drive unit. In a method in which it is ensured that the vehicle may continue to drive safely even in the event of a defect in a drive train element between the first drive unit and the second drive unit, the torque portion used for charging the energy storage device is reduced to a minimum torque, while the torque excess, which is reduced in the event of a defect in the drive train element but still exceeds the minimum torque, is utilized to propel the vehicle.
Abstract:
A hybrid drive (52) of a motor vehicle (50). In the motor vehicle (50), an electric motor (58) acts as the driving force on a first axle (54) and an internal combustion engine (60) as a driving force on a second axle (56). In an operation, in which only the electric motor (58) acts on the first axle (54), a check is made to determine whether the internal combustion engine (60) is to be started to drive the second axle (56), wherein a first set of conditions for a road start, taking into account first criteria, and a second set of conditions for a starter motor start, taking into account second criteria, are defined and checks are made independently of one another to determine whether the first set of conditions for a road start or the second set of conditions for a starter motor start has been met.
Abstract:
A method for driving a hybrid vehicle during a load reversal includes: the application of a first torque on a first hybrid vehicle axle during an acceleration reversal; and the application of a second torque on a second hybrid vehicle axle during the acceleration reversal, a direction of action of the second torque being opposite to a direction of action of the first torque.
Abstract:
A hybrid drive system for a motor vehicle includes an internal combustion engine and at least one electric motor, each driving wheels of the motor vehicle. The internal combustion engine is coupled to the corresponding wheels via a first multispeed transmission. The electric motor is coupled to the corresponding wheels via a second multispeed transmission.
Abstract:
A method and device for influencing the longitudinal velocity of a motor vehicle, in which a setpoint minimum distance and/or a setpoint maximum velocity is presettable by the driver, the driver being able to influence the vehicle velocity via the accelerator pedal and/or brake pedal, and in which the distance from a vehicle traveling ahead is measured by a distance-measuring sensor and, if the setpoint minimum distance is undershot and/or the setpoint maximum velocity is exceeded by the vehicle velocity, the vehicle velocity is limited so that the setpoint minimum distance is not undershot and/or the setpoint maximum velocity is not exceeded. This function is provided, in particular, in connection with an adaptive distance and cruise control system, the driver being able to activate either the adaptive distance and cruise control system or the limiting function.
Abstract:
A method and a device are for setting the longitudinal speed of a vehicle to a setpoint speed, in particular on the basis of a regulation, having controllable brakes. In operation of a cruise control system, the cruise control may be activated when the instantaneous driving speed is significantly higher than a stored setpoint speed. In this situation, there may be unwanted braking responses by the regulator, which may endanger the driver and the following road users. In such a situation, the method prevents a breaking measure from being implemented and ensures that the vehicle will coast, being braked only by the road resistance and the drag on the engine, until reaching the set speed. The driving response of the cruise control system approximates that of a human driver, so the responses of the automatic cruise control seem more intelligible for the driver.
Abstract:
A method for terminating a braking intervention of an adaptive cruise control system of a motor vehicle. The braking intervention is terminated in accordance with a predefined algorithm in response to the driver overriding of the adaptive cruise control system. In this context, the algorithm is formed in such a manner that a jerk-free transition from braking to acceleration of the motor vehicle is ensured, thus increasing the ride comfort. The transition from braking to acceleration preferably takes place in accordance with a linear function. Provision can also be made for stepwise functions. To prevent the braking operation from being terminated prematurely by an inadvertent actuation of the accelerator, provision is made for a threshold value to be adjusted for the accelerator for a desire of the driver to accelerate. This threshold value is dependent on the deceleration during braking. The higher the braking deceleration is, the more heavily the driver must operate the accelerator to initiate the acceleration process. In the case of a low deceleration, the threshold value is lower, so that it suffices to step more lightly on the accelerator to bring about an acceleration of the motor vehicle.
Abstract:
The invention is directed to a method and an arrangement for controlling an output torque of a drive train of a motor vehicle. A desired value for the output torque is made available by the adjustment of a transmission and by the control of the engine. The desired value is determined on the basis of a driver command signal as well as on the basis of a minimum and/or maximum output torque dependent upon operating variables.
Abstract:
In a method for operating a hybrid drive of a vehicle, which is driven by a combustion engine and an electric motor, the electric motor is supplied with energy from an energy store having a power reserve and the power of the combustion engine is supplemented by the power of the electric motor during a hybrid drive operation. In a situation in which the vehicle is to be removed as quickly as possible from a dangerous situation, the energy supplied from the energy store to the electric motor is supplied from the power reserve of the energy store when a dangerous situation is detected.
Abstract:
A device is described for longitudinally guiding a motor vehicle, including a sensor system for locating preceding vehicles, a controller that regulates the speed of the vehicle to a setpoint speed, either in a following driving mode as a function of the distance from a preceding vehicle or in a free driving mode, an interface to a navigation system which provides information about the traveled route, and a limiting device for limiting the setpoint speed based on the provided information. The limiting device is designed for calculating a limiting value for the setpoint speed for each possible route when the travel route is recognized as being ambiguous and for selecting the greatest of these limiting values for limiting the setpoint speed.